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Since decades electric driven venetian blinds for the outside became established and meanwhile one cannot imagine big buildings without them because of comfort and efficiency. Dunkermotoren as a supplier of venetian blind motors was decisively involved in this development.
Today's venetian blind motors are the result of decades of experience and co-operation with manufacturers of blind systems. The constant development process, which results out of this co-operation, led to products of a high level in technique and quality.
During the development different requirements had to be considered. For example.
- possibility for mounting in different head-rails
- end-limit-switches for the upper an lower end position
- keeping the blind in every position when the motor doesn't run
- minimum of running noise
- free of maintenance during a lifetime of at minimum ten years
- correct function in different environment conditions
The venetian blind motors are AC-induction motors for short-time-operation with mounted gear boxes. The motors are robustly constructed and maintenance-free during their life-time. The winding has a built-in temperature-switch, which protects the motor against damaging because of excessive stress. The rotor is a squirrel-cage rotor. The built-in electro-mechanical brake ensures a safe keeping of the load.
Standard equipment of the motors
- built in capacitor
- connector cable, length: 0.5m
- connector
For different applications single- and double-shaft motors are available in different versions.
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D240:
lower end positions fixed, external limit switch for the upper end positions
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D249, D349, D339, D739, D839:
adjustable lower and upper end limits, additional external limit switch for the upper end positions
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D248, D348, D838:
two lower end postions, external limit switch for the upper end position
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